According to a recent survey conducted by Advanced Bionics, 96% of adult users stated that they use the telephone.

The frequency and quality of this use varies considerably from one person to another, as does the way in which they use the telephone itself.

Although lots of people are able to identify the ring of a telephone, this is a lot more difficult when the environment is noisy.
There is a large variety of systems available in the shops to tell you that the telephone is ringing, in the form of synchronised lights that flash when the phone rings, or vibrators via your mobile phone. The SMS function of your mobile telephone is also very useful for sending a written message to your caller.